Concrete-mixer.



IATENTBD MAY 15, 1006.

W. B. MARTIN. CONCRETE NHXBR.

AIPLIUATION FILED OUT. 10, 1905.

, Wrm Witnesses: Inventor;

g by V Atto rn eys.

mmlmammmmmaa WILLIAM B. MARTEN, Oi BLOOMINGTON, ILLINOIS.

CGhlGRETE-MIXER.

sseeones.

Specification of Letters Patent.

Patented May 15, 1906.

Application filed October 10, 1905. fierial Ho, 282,172.

To all whom may concern:

Be it known that 1, WILLIAM B. hlARTIN, a citizen of the United States, residing at Bloom ington, in the county of McLean and State of Illinois, have invented a. new and useful Concrete-Mixer, of which the following is e specification.

This invention relates to comsrete-inixers, and is designed as on improvement upon a machine of similar character for which I received Letters Patent in the United States, dated August 8, 1905, No. 796,591.

The object of the present invention is to simplify and improve the construction of the machine and to increase its efficiency.

With the above and other objects in View, as will appear as the nature of the invention is better understood, the some consists in the novel construction and combination of parts of a concrete-mixer, as will be hereinafter fully described and claimed.

in the accompanying drawings, forming 11 part of this specification, and in which like characters of reference indicate corresponding parts, F igu re 1 is a. view in side elevation of a machine constructed in accordance with the present invention. Fig. 2 is e view in end elevation of the front portion of the In echine, the rear portion being omitted. Fig. 3 is a fragmentary detail view in section, on an enlarged scale, of the discharge portion of the apparatus.

Referring to the drawings, i designates enerelly the casing of the epperetus, which 1s preferably rectangular in horizontal section and may be constructed of any suitable material adopted to the purpose.

Projecting from one side of the casing and communicating with the interior thereof is adischsrge-s out 2, combined with the free or exit end c which is a scoop-shaped lip 3, hereinafter fully described. The spout is supported from the casing by a. pair of horimentally-disposed brace-rods 4", only one of which is shown, and by a pair of engularlydisposed brace-rods 5, the lower ends of WlJlGll are secured to the rods 4 and the up per ends to the casing.

One of the salient features of the present invention is the provision of means whereby the material within the spout shall be prevented from escape until thoroughly mixed. This function is secured by means of e metal plate 6, which is cut away to conform to the exterior of the lip, the latter being provided with e flange 4, which is bolted or riveted'to the plate and is therefore rigid therewith. The plate works at its ends between guides 7, each of which is constructed of a. bar of metal bent into an approximately U-shapc and one member of each of which is secured to the sides of the spout by bolts or rivets 8. Con:- bined with each of the guides is e of rollers 9, between which the plate works end is guided for vertical movements when the plate raised or lowered, to effect which there is a lever 10 provided that is fulcruincd upon a standard 11, secured to the upper side of the spout and has its free end con nected with e bail 12, the terminals of which are secured to the plate at 13. It will of course he understood that the plate 6 will be disposed close to the end of the spout, so that when the lip 3 is raised it will close the gap formed between the rear portion of the lip and the spout, and thereby prevent escape of material.

in the patent referred to the spout is s cy lindricel structure; but in the present instance it is shown as having an open top, as st 14, which will leave the worm l5 exposed. This letter me be constructed the some as that described in the patent or may be of any other preferred type. The illisififii for leaving the top of the casing open is to facilitate epplicetion of water to the contents of the spout, and herein resides another feature of improvement. In the potent referred to the sprinkling of the concrete is effected within the casing by means of a perforated waterpipe projecting therein. In the present invention the weterpipe 16 only extends part of the length of the spout and is su ported over the open portion thereof by brac sets 1?. The pipe has perforations which are arranged in parallel rows, the object of the arts-tigement being'to permit the cutting off of s portion of the flow of the water if desired. This is effected hv ensor a semicircular cut-off 18, which is suitaloly combined with the pipe end is provided with a handle 19, by which it may he turned. Of course this cut-off closely impinges the pipe, and it will be seen that by turning it the esco e of the water may accurately be controlle The final feature of improvement in the resent invention over that in the patent is m driving the worm directly from the source of power instead of by e sprocket-chain, as shown in the patent to which reference has been made, and this is effected by lplacing upon the shaft 20 of the worm a. pu ey 21,

around which is passed a belt to a suitable source of power.

The improvements herein defined, while simple in character, will be found thoroughly eilicient for the purposes designed and will in a practical and positive manner secure the objects sought.

Having thus described the invention, what is claimed is 1. In a concrete-mixer, the combination with a spout, of guides disposed at the discharge end thereof and provided with rollerbearings, a cut-ofl' plate having its ends working between the bearings, a lip secured to the plate, and means for raising and lowering the plate.

2. In a concrete-mixer, the combination with a spout, of guides disposed at the discharge end thereof and occupying a plane at right angles to its length, roller-bearings carried by the guides, a cut-off plate having its ends working between the bearings, a lip secured to the plate, and means for raising and lowering the plate.

3. In a concrete-mixer, the combination with a spout, of guides disposed at the discharge end thereof and occupying a plane at right angles thereto, roller-bearings carried by the guides, a cut-ofl' plate having its ends working between the bearings, a lip carried by the plate, and means for raising and lowering the plate.

4. In a concrete-mixer the combination with a spout having its upper portion open for a part of its length and a mixing-worm arranged within the spout of guides disposed at the discharge end of the spout and provided with roller-bearings, a cut-oil plate having its ends working between the bearings, a lip secured to the plate, and means for raising and lowering the plate.

In testimony that I claim the foregoing as my own I have hereto allixed my signature in the presence of two witnesses.

\VILLIAM B. MARTIN.

\Vitnesses:

H. E. DU Mans,

I1. A. HOWELL. 

